{"id":45606,"date":"2023-02-22T01:54:14","date_gmt":"2023-06-18T21:30:47","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45606-2\/"},"modified":"2024-04-29T15:42:30","modified_gmt":"2024-04-29T07:42:30","slug":"45606-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45606-2\/","title":{"rendered":""},"content":{"rendered":"<p>\u3053\u306e\u8a18\u4e8b\u306f Rust\u305d\u306e3 Advent Calendar\u306e20\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n<p>Rust \u3092\u5c11\u3057\u305a\u3064\u89e6\u308a\u59cb\u3081\u305f\u306e\u3067\u3059\u304c\u3001C++ \u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u30ea\u30f3\u30af\u3059\u308b\u5fc5\u8981\u304c\u51fa\u3066\u304d\u3066\u3057\u307e\u3063\u305f\u306e\u3067\uff08\u305d\u306e\u7406\u7531\u306f\u307e\u305f\u5225\u306e\u6a5f\u4f1a\u3067\uff09\u3001\u81ea\u5206\u306a\u308a\u306b\u307e\u3068\u3081\u3066\u307f\u305f\u3053\u3068\u3092\u66f8\u3044\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306e\u74b0\u5883\u306f\u3053\u3093\u306a\u3068\u3053\u308d\u3067\u3059\u3002\u3044\u3064\u3082\u591c\u3070\u304b\u308a\u3067\u3059\u304c\u3001\u4e45\u3005\u306b stable \u306b\u3057\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">macOS 10.14.6 (18G2022)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">rustc 1.39.0 (4560ea788 2019-11-04)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">cargo 1.39.0 (1c6ec66d5 2019-09-30)<\/ul>\n<h1>Rust \u3067 C++ \u306e\u30af\u30e9\u30b9\u3092\u6271\u3046\u305f\u3081\u306b\u306f<\/h1>\n<p>Rust \u3067 C++ \u306e\u30af\u30e9\u30b9\u3092\u76f4\u63a5\u6271\u3046\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u3088\u3046\u3067\u3059\u306e\u3067\u3001\u9069\u5f53\u306b\u30e9\u30c3\u30d7\u3057\u3066\u3001\u30e9\u30c3\u30d1\u30fc\u7d4c\u7531\u3067\u6271\u3044\u307e\u3059\u3002\u30e9\u30c3\u30d7\u306e\u3057\u304b\u305f\u3068\u3057\u3066\u306f\u3001<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>C++ \u5074\u3067\u30e9\u30c3\u30d7\u3059\u308b<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>Rust \u5074\u3067\u30e9\u30c3\u30d7\u3059\u308b<\/ol>\n<p>\u306e\u3069\u3061\u3089\u304b\u3067\u3057\u3087\u3046\u3002\u305d\u3053\u3067\u3001\u8efd\u304f\u5b9f\u88c5\u3057\u3066\u6bd4\u3079\u3066\u307f\u307e\u3057\u305f\u3002\u307e\u305f\u3001\u30e9\u30c3\u30d1\u30fc\u3092\u751f\u6210\u3059\u308b\u30c4\u30fc\u30eb bindgen \u306e\u4f7f\u3044\u52dd\u624b\u3082\u307f\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<h1>C++ \u306e\u30b5\u30f3\u30d7\u30eb<\/h1>\n<p>\u7c21\u5358\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u7528\u610f\u3057\u3066\u307f\u307e\u3057\u305f\u3002\uff08C++ \u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u304f\u306e\u306f\u3044\u3064\u4ee5\u6765\u3060\u308d\u3046&#8230; \u5b8c\u74a7\u306b\u5fd8\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u5bc6\u6797\u3067\u30b9\u30c8\u30ed\u30fc\u30b9\u30c8\u30e9\u30c3\u30d7\u672c\u3092\u8cb7\u3063\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002\u3048\u3063\u3001\u8f9e\u66f8\u4e26\u306e\u539a\u3055&#8230;\uff09<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">class<\/span> <span class=\"nc\">Dog<\/span> <span class=\"p\">{<\/span>\r\n<span class=\"nl\">public:<\/span>\r\n    <span class=\"k\">enum<\/span> <span class=\"n\">status<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">STATUS_WALKING<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">STATUS_STOP<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">STATUS_EATING<\/span>\r\n    <span class=\"p\">};<\/span>\r\n\r\n<span class=\"nl\">private:<\/span>\r\n    <span class=\"k\">const<\/span> <span class=\"kt\">char<\/span> <span class=\"o\">*<\/span><span class=\"n\">_name<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">enum<\/span> <span class=\"n\">status<\/span> <span class=\"n\">_status<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nl\">public:<\/span>\r\n    <span class=\"n\">Dog<\/span><span class=\"p\">(<\/span><span class=\"k\">const<\/span> <span class=\"kt\">char<\/span> <span class=\"o\">*<\/span><span class=\"n\">name<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"o\">~<\/span><span class=\"n\">Dog<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"kt\">void<\/span> <span class=\"n\">walk<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"kt\">void<\/span> <span class=\"n\">stop<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"k\">enum<\/span> <span class=\"n\">status<\/span> <span class=\"n\">status<\/span><span class=\"p\">()<\/span> <span class=\"k\">const<\/span> <span class=\"p\">{<\/span> <span class=\"k\">return<\/span> <span class=\"n\">_status<\/span><span class=\"p\">;<\/span> <span class=\"p\">}<\/span>\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"cp\">#include \"dog.hpp\"\r\n#include &lt;cstdio&gt;\r\n<\/span>\r\n<span class=\"n\">Dog<\/span><span class=\"o\">::<\/span><span class=\"n\">Dog<\/span><span class=\"p\">(<\/span><span class=\"k\">const<\/span> <span class=\"kt\">char<\/span> <span class=\"o\">*<\/span><span class=\"n\">name<\/span><span class=\"p\">)<\/span> <span class=\"o\">:<\/span>\r\n    <span class=\"n\">_name<\/span> <span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">),<\/span> <span class=\"n\">_status<\/span> <span class=\"p\">(<\/span><span class=\"n\">STATUS_STOP<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">{<\/span>\r\n    <span class=\"n\">std<\/span><span class=\"o\">::<\/span><span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%s: \u304a\u306f\u3088\u3046\u3001\u308f\u3093\uff01<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">_name<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"n\">Dog<\/span><span class=\"o\">::~<\/span><span class=\"n\">Dog<\/span><span class=\"p\">()<\/span>\r\n<span class=\"p\">{<\/span>\r\n    <span class=\"n\">std<\/span><span class=\"o\">::<\/span><span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%s: \u304a\u3084\u3059\u307f\u3001\u308e\u3093\uff0e<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">_name<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"kt\">void<\/span> <span class=\"n\">Dog<\/span><span class=\"o\">::<\/span><span class=\"n\">walk<\/span><span class=\"p\">()<\/span>\r\n<span class=\"p\">{<\/span>\r\n    <span class=\"n\">std<\/span><span class=\"o\">::<\/span><span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%s: \u308f\u3093\u308f\u3093\uff01<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">_name<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"n\">_status<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">STATUS_WALKING<\/span><span class=\"p\">)<\/span> <span class=\"n\">_status<\/span> <span class=\"o\">=<\/span> <span class=\"n\">STATUS_WALKING<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"kt\">void<\/span> <span class=\"n\">Dog<\/span><span class=\"o\">::<\/span><span class=\"n\">stop<\/span><span class=\"p\">()<\/span>\r\n<span class=\"p\">{<\/span>\r\n    <span class=\"n\">std<\/span><span class=\"o\">::<\/span><span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%s: \u308f\u3093\uff0e<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">_name<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"n\">_status<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">STATUS_STOP<\/span><span class=\"p\">)<\/span> <span class=\"n\">_status<\/span> <span class=\"o\">=<\/span> <span class=\"n\">STATUS_STOP<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u65b9\u6cd5\uff11: C++ \u5074\u3067\u30e9\u30c3\u30d7\u3059\u308b<\/h1>\n<p>\u3053\u3061\u3089\u306e\u65b9\u6cd5\u306f \u79cb\u6d25\u65e9\u82d7\u3055\u3093\u306e\u8a18\u4e8b1\u3092\u53c2\u8003\u306b\u3055\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>C++ \u5074\u3067\u306f class \u3092 struct \u3067\u30e9\u30c3\u30d7\u3057\u3066\u3001\u5404\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u95a2\u6570\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30a2\u30af\u30bb\u30b5\u95a2\u6570\u3082\u5b9f\u88c5\u3057\u307e\u3059\u3002\u5404\u95a2\u6570\u306f extern &#8220;C&#8221; \u3068\u3059\u308b\u3053\u3068\u3067\u3001mangle \u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">#include \"dog.hpp\"\r\n<\/span>\r\n<span class=\"k\">extern<\/span> <span class=\"s\">\"C\"<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">typedef<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">Dog<\/span> <span class=\"n\">impl<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span> <span class=\"n\">DogImpl<\/span><span class=\"p\">;<\/span>\r\n\r\n    <span class=\"n\">DogImpl<\/span><span class=\"o\">*<\/span> <span class=\"n\">Dog_Dog<\/span><span class=\"p\">(<\/span><span class=\"k\">const<\/span> <span class=\"kt\">char<\/span><span class=\"o\">*<\/span> <span class=\"n\">name<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">Dog<\/span> <span class=\"o\">*<\/span><span class=\"n\">dog<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"n\">Dog<\/span><span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"p\">(<\/span><span class=\"n\">DogImpl<\/span><span class=\"o\">*<\/span><span class=\"p\">)<\/span><span class=\"n\">dog<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"kt\">void<\/span> <span class=\"n\">Dog_Dog_destructor<\/span><span class=\"p\">(<\/span><span class=\"n\">DogImpl<\/span><span class=\"o\">*<\/span> <span class=\"n\">di<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">di<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">impl<\/span><span class=\"p\">.<\/span><span class=\"o\">~<\/span><span class=\"n\">Dog<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"kt\">void<\/span> <span class=\"n\">Dog_walk<\/span><span class=\"p\">(<\/span><span class=\"n\">DogImpl<\/span><span class=\"o\">*<\/span> <span class=\"n\">di<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">di<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">impl<\/span><span class=\"p\">.<\/span><span class=\"n\">walk<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"kt\">void<\/span> <span class=\"n\">Dog_stop<\/span><span class=\"p\">(<\/span><span class=\"n\">DogImpl<\/span><span class=\"o\">*<\/span> <span class=\"n\">di<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">di<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">impl<\/span><span class=\"p\">.<\/span><span class=\"n\">stop<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">Dog_status<\/span><span class=\"p\">(<\/span><span class=\"n\">DogImpl<\/span><span class=\"o\">*<\/span> <span class=\"n\">di<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">di<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">impl<\/span><span class=\"p\">.<\/span><span class=\"n\">status<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>Rust \u5074\u3067 Rust \u3089\u3057\u3044\u62bd\u8c61\u5316\u3092\u3061\u3087\u3063\u3068\u3057\u3066\u307f\u308b<\/h2>\n<p>C++ \u306e\u95a2\u6570\u3092\u76f4\u63a5\u547c\u3073\u51fa\u3057\u3066\u3082\u826f\u3044\u306e\u3067\u3059\u304c\u3001\u3061\u3087\u3063\u3068\u3060\u3051 Rust\u3063\u307d\u304f\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<p>C++ \u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e2d\u8eab\u306f\u76f4\u63a5\u89e6\u308a\u305f\u304f\u306a\u3044\u306e\u3067\u3001\u30d0\u30ea\u30a2\u30f3\u30c8\u306a\u3057\u306e enum \u578b\u3067\u8868\u73fe\u3057\u3001\u89e6\u308a\u305f\u304f\u3066\u3082\u89e6\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u30b9\u30b3\u30fc\u30d7\u304b\u3089\u5916\u308c\u305f\u3089\u81ea\u52d5\u7684\u306b\u30c9\u30ed\u30c3\u30d7\u3055\u308c\u308b\u3088\u3046\u306b Drop \u30c8\u30ec\u30a4\u30c8\u3092\u5b9f\u88c5\u3057\u3066\u3001\u305d\u3053\u304b\u3089 C++ \u306e\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3059\u306e\u304c\u826f\u3055\u305d\u3046\u3067\u3059\u3002C++ \u306e\u5217\u6319\u4f53\u306e\u3046\u3061 &#8220;\u5358\u306a\u308b enum&#8221; \u306f\u3001\u6839\u5e95\u578b\u304c\u660e\u793a\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3001\u5168\u3066\u306e\u5217\u6319\u5b50\u304c int \u3084 unsigned int \u3067\u8868\u73fe\u3067\u304d\u308b\u9650\u308a\u3001sizeof(int) \u3092\u8d85\u3048\u306a\u3044\u6c4e\u6574\u6570\u578b\u3067\u8868\u73fe\u3055\u308c\u307e\u30592\uff08@SaitoAtsushi\u3055\u3093\u3001\u30b3\u30e1\u30f3\u30c8\u3092\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305f\uff09\u3002\u307e\u305f\u3001Rust \u306e enum \u578b\u306f\u3069\u3093\u306a\u30d0\u30ea\u30a2\u30f3\u30c8\u304c\u3042\u308b\u304b\u306b\u3088\u3063\u3066\u6574\u6570\u578b\u306e\u30b5\u30a4\u30ba\u304c\u7570\u306a\u308a\u5f97\u307e\u3059\u3002\u305d\u3053\u3067\u3001sizeof(enum Dog::status) \u3092 C++ \u30b3\u30f3\u30d1\u30a4\u30e9\u3092\u901a\u3057\u3066\u8abf\u3079\u305f\u3068\u3053\u308d 4 \u3067\u3057\u305f\u306e\u3067\u3001Rust \u3067\u306f u32 \u578b\u3068\u3057\u3066\u3044\u307e\u3059\u3002Rust \u4e0a\u3067 #repr[(C)] \u3092\u6307\u5b9a\u3057\u305f enum \u578b\u3092\u4f7f\u3046\u3053\u3068\u3082\u8003\u3048\u305f\u306e\u3067\u3059\u304c\u3001C++ \u306e &#8220;\u5358\u306a\u308b enum&#8221; \u3067\u306f\u30ad\u30e3\u30b9\u30c8\u3059\u308b\u3053\u3068\u3067\u5217\u6319\u5b50\u4ee5\u5916\u306e\u5024\u3092\u4ee3\u5165\u3059\u308b\u3068\u3044\u3046\u6280\u304c\u4f7f\u3048\u308b\u306e\u3067\u3001\u300c\u6df7\u305c\u308b\u306a\u5371\u967a\u300d\u3068\u3044\u3046\u3053\u3068\u3067\u3084\u3081\u307e\u3057\u305f\u3002\u5404\u30e1\u30bd\u30c3\u30c9\u306f\u5c11\u3057\u3067\u3082\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u6e1b\u3089\u3059\u610f\u5473\u3067\u3001#[inline] \u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>Rust \u578b\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">os<\/span><span class=\"p\">::<\/span><span class=\"nn\">raw<\/span><span class=\"p\">::<\/span><span class=\"nb\">c_char<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">pub<\/span> <span class=\"k\">enum<\/span> <span class=\"n\">DogImpl<\/span> <span class=\"p\">{}<\/span>\r\n\r\n<span class=\"k\">extern<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">Dog_Dog<\/span><span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">c_char<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">DogImpl<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">Dog_Dog_destructor<\/span><span class=\"p\">(<\/span><span class=\"n\">dog<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">DogImpl<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">Dog_walk<\/span><span class=\"p\">(<\/span><span class=\"n\">dog<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">DogImpl<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">Dog_stop<\/span><span class=\"p\">(<\/span><span class=\"n\">dog<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">DogImpl<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">Dog_status<\/span><span class=\"p\">(<\/span><span class=\"n\">dog<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">DogImpl<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">u32<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">pub<\/span> <span class=\"k\">struct<\/span> <span class=\"n\">Dog<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">raw<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">DogImpl<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">Dog<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">const<\/span> <span class=\"n\">STATUS_WALKING<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">const<\/span> <span class=\"n\">STATUS_STOP<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">const<\/span> <span class=\"n\">STATUS_EATING<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n\r\n    <span class=\"nd\">#[inline]<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">c_char<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Self<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span> <span class=\"n\">Dog<\/span> <span class=\"p\">{<\/span> <span class=\"n\">raw<\/span><span class=\"p\">:<\/span> <span class=\"nf\">Dog_Dog<\/span><span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">)<\/span> <span class=\"p\">}<\/span> <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nd\">#[inline]<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">walk<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span> <span class=\"nf\">Dog_walk<\/span><span class=\"p\">(<\/span><span class=\"k\">self<\/span><span class=\"py\">.raw<\/span><span class=\"p\">)<\/span> <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nd\">#[inline]<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">stop<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span> <span class=\"nf\">Dog_stop<\/span><span class=\"p\">(<\/span><span class=\"k\">self<\/span><span class=\"py\">.raw<\/span><span class=\"p\">)<\/span> <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nd\">#[inline]<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">status<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">u32<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span> <span class=\"nf\">Dog_status<\/span><span class=\"p\">(<\/span><span class=\"k\">self<\/span><span class=\"py\">.raw<\/span><span class=\"p\">)<\/span> <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">Drop<\/span> <span class=\"k\">for<\/span> <span class=\"n\">Dog<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nd\">#[inline]<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"k\">drop<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span> <span class=\"nf\">Dog_Dog_destructor<\/span><span class=\"p\">(<\/span><span class=\"k\">self<\/span><span class=\"py\">.raw<\/span><span class=\"p\">)<\/span> <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u30d3\u30eb\u30c9\u307e\u308f\u308a\u3092\u6307\u5b9a\u3059\u308b<\/h2>\n<p>C++ \u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u3068\u30ea\u30f3\u30af\u3092\u3059\u308b\u305f\u3081\u306b\u3001build.rs \u3092\u66f8\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">extern<\/span> <span class=\"n\">crate<\/span> <span class=\"n\">cc<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"cargo:rustc-link-lib=c++\"<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"nn\">cc<\/span><span class=\"p\">::<\/span><span class=\"nn\">Build<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">()<\/span>\r\n        <span class=\"nf\">.file<\/span><span class=\"p\">(<\/span><span class=\"s\">\"src\/dog.cpp\"<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"nf\">.file<\/span><span class=\"p\">(<\/span><span class=\"s\">\"src\/wrapper.cpp\"<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"nf\">.include<\/span><span class=\"p\">(<\/span><span class=\"s\">\"src\"<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"nf\">.compile<\/span><span class=\"p\">(<\/span><span class=\"s\">\"dog\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nn\">[package]<\/span>\r\n<span class=\"py\">name<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"dog2\"<\/span>\r\n<span class=\"py\">version<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.1.0\"<\/span>\r\n<span class=\"py\">authors<\/span> <span class=\"p\">=<\/span> <span class=\"p\">[<\/span><span class=\"s\">\"Satoshi Moriai &lt;satoshi.moriai@gmail.com&gt;\"<\/span><span class=\"p\">]<\/span>\r\n<span class=\"py\">edition<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"2018\"<\/span>\r\n<span class=\"py\">build<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"build.rs\"<\/span>\r\n\r\n<span class=\"nn\">[build-dependencies]<\/span>\r\n<span class=\"py\">cc<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"1.0\"<\/span>\r\n\r\n<span class=\"nn\">[dependencies]<\/span>\r\n<\/code><\/pre>\n<h1>\u65b9\u6cd5\uff12: Rust \u5074\u3067\u30e9\u30c3\u30d7\u3059\u308b<\/h1>\n<p>\u3053\u3061\u3089\u306e\u65b9\u6cd5\u306f@mod_poppo\u3055\u3093\u306e\u8a18\u4e8b3\u3092\u53c2\u8003\u306b\u3055\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>C++ \u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u3068 extern &#8220;C&#8221; \u5ba3\u8a00\u304c\u306a\u3044\u8b58\u5225\u5b50\u306f mangle \u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u306e\u3067\u3001Rust \u304b\u3089\u547c\u3073\u51fa\u3059\u305f\u3081\u306b\u306f\u3001\u3069\u306e\u3088\u3046\u306b mangle \u3055\u308c\u3066\u3044\u308b\u304b\u3092 Rust \u306b\u6559\u3048\u3066\u3084\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001C++ \u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u3067\u304d\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d5\u30a1\u30a4\u30eb\u304b\u3089 nm \u3067\u30b7\u30f3\u30dc\u30eb\u60c5\u5831\u3092\u53d6\u308a\u51fa\u3057\u3001\u305d\u308c\u3092 demangle \u3057\u305f\u7d50\u679c\u3092\u3082\u3068\u306b\u30e9\u30c3\u30d1\u30fc\u3092\u66f8\u3044\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ clang++ -c src\/dog.cpp -o dog.o\r\n$ nm dog.o | cut -c20- &gt; dog.sym\r\n$ c++filt @dog.sym | paste dog.sym -\r\n__ZN3Dog4stopEv Dog::stop()\r\n__ZN3Dog4walkEv Dog::walk()\r\n__ZN3DogC1EPKc  Dog::Dog(char const*)\r\n__ZN3DogC2EPKc  Dog::Dog(char const*)\r\n__ZN3DogD1Ev    Dog::~Dog()\r\n__ZN3DogD2Ev    Dog::~Dog()\r\n...\r\n<\/code><\/pre>\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3068\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306e mangle \u540d\u306b\u3064\u3044\u3066\u306f GCC \u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9 \u306e\u30b3\u30e1\u30f3\u30c8\u306b\u4e0b\u8a18\u306e\u8a18\u8ff0\u3092\u898b\u3064\u3051\u307e\u3057\u305f\uff08GitHub \u3068 Google \u5148\u751f\u306b\u611f\u8b1d\u3067\u3059\uff09\u3002\u4eca\u56de\u306f\u30af\u30e9\u30b9\u306e\u7d99\u627f\u304c\u306a\u3044\u306e\u3067\u3001C1 \u3068 D1 \u3092\u4f7f\u3048\u3070\u826f\u3055\u305d\u3046\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code> &lt;special-name&gt; ::= C1   # complete object constructor\r\n                ::= C2   # base object constructor\r\n                ::= C3   # complete object allocating constructor\r\n Currently, allocating constructors are never used.\r\n\r\n &lt;special-name&gt; ::= D0 # deleting (in-charge) destructor\r\n                ::= D1 # complete object (in-charge) destructor\r\n                ::= D2 # base object (not-in-charge) destructor\r\n<\/code><\/pre>\n<p>\u3067\u306f\u3001\u66f8\u3044\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">os<\/span><span class=\"p\">::<\/span><span class=\"nn\">raw<\/span><span class=\"p\">::<\/span><span class=\"nb\">c_char<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">mem<\/span><span class=\"p\">::<\/span><span class=\"n\">MaybeUninit<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nd\">#[repr(C)]<\/span>\r\n<span class=\"nd\">#[derive(Debug)]<\/span>\r\n<span class=\"k\">pub<\/span> <span class=\"k\">struct<\/span> <span class=\"n\">Dog<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"mi\">_<\/span><span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">c_char<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"mi\">_<\/span><span class=\"n\">status<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u32<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">extern<\/span> <span class=\"s\">\"C\"<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nd\">#[link_name<\/span> <span class=\"nd\">=<\/span> <span class=\"s\">\"<\/span><span class=\"err\">\\<\/span><span class=\"s\">u{1}__ZN3DogC1EPKc\"<\/span><span class=\"nd\">]<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">Dog_Dog<\/span><span class=\"p\">(<\/span><span class=\"n\">this<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">Dog<\/span><span class=\"p\">,<\/span> <span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">c_char<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nd\">#[link_name<\/span> <span class=\"nd\">=<\/span> <span class=\"s\">\"<\/span><span class=\"err\">\\<\/span><span class=\"s\">u{1}__ZN3DogD1Ev\"<\/span><span class=\"nd\">]<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">Dog_Dog_destructor<\/span><span class=\"p\">(<\/span><span class=\"n\">this<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">Dog<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nd\">#[link_name<\/span> <span class=\"nd\">=<\/span> <span class=\"s\">\"<\/span><span class=\"err\">\\<\/span><span class=\"s\">u{1}__ZN3Dog4walkEv\"<\/span><span class=\"nd\">]<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">Dog_walk<\/span><span class=\"p\">(<\/span><span class=\"n\">this<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">Dog<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nd\">#[link_name<\/span> <span class=\"nd\">=<\/span> <span class=\"s\">\"<\/span><span class=\"err\">\\<\/span><span class=\"s\">u{1}__ZN3Dog4stopEv\"<\/span><span class=\"nd\">]<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">Dog_stop<\/span><span class=\"p\">(<\/span><span class=\"n\">this<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">Dog<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">Dog<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">const<\/span> <span class=\"n\">STATUS_WALKING<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">const<\/span> <span class=\"n\">STATUS_STOP<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">const<\/span> <span class=\"n\">STATUS_EATING<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n\r\n    <span class=\"nd\">#[inline]<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">c_char<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Self<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">dog<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">MaybeUninit<\/span><span class=\"p\">::<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">Dog<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">::<\/span><span class=\"nf\">uninit<\/span><span class=\"p\">();<\/span>\r\n            <span class=\"nf\">Dog_Dog<\/span><span class=\"p\">(<\/span><span class=\"n\">dog<\/span><span class=\"nf\">.as_mut_ptr<\/span><span class=\"p\">(),<\/span> <span class=\"n\">name<\/span><span class=\"p\">);<\/span>\r\n            <span class=\"n\">dog<\/span><span class=\"nf\">.assume_init<\/span><span class=\"p\">()<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nd\">#[inline]<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">walk<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span> <span class=\"nf\">Dog_walk<\/span><span class=\"p\">(<\/span><span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nd\">#[inline]<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">stop<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span> <span class=\"nf\">Dog_stop<\/span><span class=\"p\">(<\/span><span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nd\">#[inline]<\/span>\r\n    <span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">status<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">u32<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">self<\/span><span class=\"py\">._status<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">Drop<\/span> <span class=\"k\">for<\/span> <span class=\"n\">Dog<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nd\">#[inline]<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"k\">drop<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span> <span class=\"nf\">Dog_Dog_destructor<\/span><span class=\"p\">(<\/span><span class=\"k\">self<\/span><span class=\"p\">)<\/span> <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>#[link_name = &#8230;] \u306b\u3088\u3063\u3066\u30ea\u30f3\u30af\u3059\u3079\u304d\u30b7\u30f3\u30dc\u30eb\u540d\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u30b7\u30f3\u30dc\u30eb\u540d\u306e\u982d\u306b \\u{1} \u3068\u3044\u3046\u304a\u307e\u3058\u306a\u3044\u3092\u3064\u3051\u308b\u3068\u3001LLVM \u304c mangling \u3084 _ \u3092\u982d\u306b\u3064\u3051\u305f\u308a\u306a\u3069\u306e\u30b7\u30f3\u30dc\u30eb\u540d\u306e\u5909\u63db\u51e6\u7406\u3092\u3057\u307e\u305b\u3093\u3002C++ \u306e\u30af\u30e9\u30b9\u306f Rust \u306e #[repr(C)] \u4ed8\u304d\u306e struct \u3067\u8868\u73fe\u3057\u307e\u3059\u3002enum \u306b\u3064\u3044\u3066\u306f\u3001\u65b9\u6cd5\uff11\u3068\u540c\u3058\u3067\u3059\u3002\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u672c\u4f53\u306f C++ \u5074\u306b\u3042\u308a\u307e\u3059\u304c\u3001Rust \u5074\u3067\u672a\u521d\u671f\u5316\u9818\u57df\u3092\u7528\u610f\u3057\u3066\u304b\u3089\u3001C++ \u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\uff08\u3067\u3001\u5927\u4e08\u592b\u304b\u306a\uff1f\uff09\u3002\u672a\u521d\u671f\u5316\u9818\u57df\u3092\u6271\u3046\u306e\u3067\u3001\u6700\u8fd1 stable \u3067\u3082\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u3063\u305f std::mem::MaybeUninit \u3092\u4f7f\u3044\u307e\u3059\u3002\u4ed6\u306f\u65b9\u6cd5\uff11\u3068\u3060\u3044\u305f\u3044\u540c\u3058\u3067\u3059\u3002<\/p>\n<p>build.rs \u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">extern<\/span> <span class=\"n\">crate<\/span> <span class=\"n\">cc<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/println!(\"cargo:rustc-link-lib=c++\");<\/span>\r\n\r\n    <span class=\"nn\">cc<\/span><span class=\"p\">::<\/span><span class=\"nn\">Build<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">()<\/span>\r\n        <span class=\"nf\">.file<\/span><span class=\"p\">(<\/span><span class=\"s\">\"src\/dog.cpp\"<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"nf\">.include<\/span><span class=\"p\">(<\/span><span class=\"s\">\"src\"<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"nf\">.compile<\/span><span class=\"p\">(<\/span><span class=\"s\">\"dog\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>Cargo.toml \u306f\u65b9\u6cd5\uff11\u3068\u540c\u3058\u3067\u3059\u3002C++ \u3084 C++ \u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u306f\u3001C++ \u30e9\u30f3\u30bf\u30a4\u30e0\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u4e0d\u8981\u3068\u306a\u308b\u3053\u3068\u3082\u3042\u308b\u3088\u3046\u3067\u3059\u3002\u30ea\u30f3\u30af\u6642\u306b\u30a8\u30e9\u30fc\u306b\u306a\u308b\u5834\u5408\u306b\u306f\u3001println! \u306e\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3092\u5916\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h1>\u6bd4\u8f03<\/h1>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3068\u3053\u308d\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<div>\n<div class=\"post-table\">\nC++ \u3067\u30e9\u30c3\u30d7\u3059\u308bRust \u3067\u30e9\u30c3\u30d7\u3059\u308b\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u5c11\u3057\u3042\u308a\u306a\u3057\u30af\u30e9\u30b9\u30e1\u30f3\u30d0\u3078\u306e\u30a2\u30af\u30bb\u30b9\u4e0d\u53ef\u53ef\u80fd\u66f8\u304d\u3084\u3059\u3055\u697d\u5c11\u3005\u3081\u3093\u3069\u3046\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u826f\u826f\u304f\u306a\u3044<\/div>\n<\/div>\n<p>\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306b\u3064\u3044\u3066\u306f\u3001C++ \u30b3\u30fc\u30c9\u306e\u5909\u66f4\u3078\u306e\u8ffd\u5f93\u304c\u697d\u304b\u3069\u3046\u304b\u3067\u5224\u65ad\u3057\u307e\u3057\u305f\u304c\u3001C++ \u306e\u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u3001\u30e9\u30c3\u30d1\u30fc\u3092\u81ea\u52d5\u751f\u6210\u3067\u304d\u308b\u306e\u3067\u3042\u308c\u3070\u3001\u3042\u307e\u308a\u554f\u984c\u306b\u306a\u3089\u306a\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<h1>bindgen \u3092\u4f7f\u3063\u3066\u307f\u308b<\/h1>\n<p>\u3068\u3044\u3046\u3053\u3068\u3067\u3001C\/C++ \u306e\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u30e9\u30c3\u30d1\u30fc\u3092\u81ea\u52d5\u751f\u6210\u3059\u308b bindgen \u3068\u3044\u3046\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u4f7f\u3063\u3066\u307f\u308b\u3053\u3068\u306b\u3057\u307e\u3059\u3002\u3053\u3061\u3089\u306e\u65b9\u6cd5\u306f bindgen \u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c84\u3092\u53c2\u8003\u306b\u3057\u306a\u304c\u3089\u9032\u3081\u307e\u3059\u3002<\/p>\n<h2>\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/h2>\n<p>macOS \u3067\u306f\u6b21\u306e\u3088\u3046\u306a\u611f\u3058\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ brew install llvm\r\n$ cargo install bindgen\r\n<\/code><\/pre>\n<h2>\u30d3\u30eb\u30c9\u307e\u308f\u308a\u3092\u6307\u5b9a\u3059\u308b<\/h2>\n<p>\u300cRust \u3067\u30e9\u30c3\u30d7\u3059\u308b\u300d\u7248\u306e Cargo.toml \u306b\u4ee5\u4e0b\u3092\u52a0\u3048\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nn\">[build-dependencies]<\/span>\r\n<span class=\"py\">bindgen<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.52\"<\/span>\r\n<\/code><\/pre>\n<p>build.rs \u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">extern<\/span> <span class=\"n\">crate<\/span> <span class=\"n\">cc<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">extern<\/span> <span class=\"n\">crate<\/span> <span class=\"n\">bindgen<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"n\">env<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">path<\/span><span class=\"p\">::<\/span><span class=\"n\">PathBuf<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/println!(\"cargo:rustc-link-lib=c++\");<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"cargo:rerun-if-changed=src\/dog.hpp\"<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"nn\">cc<\/span><span class=\"p\">::<\/span><span class=\"nn\">Build<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">()<\/span>\r\n        <span class=\"nf\">.file<\/span><span class=\"p\">(<\/span><span class=\"s\">\"src\/dog.cpp\"<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"c\">\/\/.flag(\"-std=c++17\")<\/span>\r\n        <span class=\"nf\">.include<\/span><span class=\"p\">(<\/span><span class=\"s\">\"src\"<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"nf\">.compile<\/span><span class=\"p\">(<\/span><span class=\"s\">\"dog\"<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"k\">let<\/span> <span class=\"n\">bindings<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">bindgen<\/span><span class=\"p\">::<\/span><span class=\"nn\">Builder<\/span><span class=\"p\">::<\/span><span class=\"nf\">default<\/span><span class=\"p\">()<\/span>\r\n        <span class=\"nf\">.header<\/span><span class=\"p\">(<\/span><span class=\"s\">\"src\/dog.hpp\"<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"nf\">.parse_callbacks<\/span><span class=\"p\">(<\/span><span class=\"nn\">Box<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"nn\">bindgen<\/span><span class=\"p\">::<\/span><span class=\"n\">CargoCallbacks<\/span><span class=\"p\">))<\/span>\r\n        <span class=\"nf\">.generate<\/span><span class=\"p\">()<\/span>\r\n        <span class=\"nf\">.expect<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Unable to generate bindings\"<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"k\">let<\/span> <span class=\"n\">out_path<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">PathBuf<\/span><span class=\"p\">::<\/span><span class=\"nf\">from<\/span><span class=\"p\">(<\/span><span class=\"nn\">env<\/span><span class=\"p\">::<\/span><span class=\"nf\">var<\/span><span class=\"p\">(<\/span><span class=\"s\">\"OUT_DIR\"<\/span><span class=\"p\">)<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">());<\/span>\r\n    <span class=\"n\">bindings<\/span>\r\n        <span class=\"nf\">.write_to_file<\/span><span class=\"p\">(<\/span><span class=\"n\">out_path<\/span><span class=\"nf\">.join<\/span><span class=\"p\">(<\/span><span class=\"s\">\"dog.rs\"<\/span><span class=\"p\">))<\/span>\r\n        <span class=\"nf\">.expect<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Couldn't write bindings!\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u524d\u534a\u3067 src\/dog.cpp \u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u3092\u884c\u3044\u3001\u5f8c\u534a\u3067 src\/dog.hpp \u3092\u8aad\u307f\u8fbc\u3093\u3067\u3001${OUT_DIR}\/dog.rs \u306b\u66f8\u304d\u51fa\u3057\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306b\u3001src\/main.rs \u306e\u5148\u982d\u306b\u4ee5\u4e0b\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">#![allow(non_upper_case_globals)]<\/span>\r\n<span class=\"nd\">#![allow(non_camel_case_types)]<\/span>\r\n<span class=\"nd\">#![allow(non_snake_case)]<\/span>\r\n<span class=\"nd\">include!<\/span><span class=\"p\">(<\/span><span class=\"nd\">concat!<\/span><span class=\"p\">(<\/span><span class=\"nd\">env!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"OUT_DIR\"<\/span><span class=\"p\">),<\/span> <span class=\"s\">\"\/dog.rs\"<\/span><span class=\"p\">));<\/span>\r\n<\/code><\/pre>\n<p>\u3042\u3068\u306f\u3001main.rs \u3067\u5909\u6570\u540d\u306a\u3069\u3092 bindgen \u304c\u5410\u304f\u30b9\u30bf\u30a4\u30eb\u306b\u4fee\u6b63\u3057\u3066\u3001\u30d3\u30eb\u30c9\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>bindgen \u304c\u751f\u6210\u3057\u305f\u30b3\u30fc\u30c9\u3092\u307f\u3066\u307f\u308b\u3068\u3001\u65b9\u6cd5\uff12\u3067\u8ff0\u3079\u305f Rust \u3067\u30e9\u30c3\u30d7\u3057\u305f\u30b3\u30fc\u30c9\u3092\u751f\u6210\u3057\u3066\u3044\u3066\u3001\u305d\u306e\u307e\u307e\u5341\u5206\u306b\u4f7f\u3048\u308b\u30b3\u30fc\u30c9\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u305f\u3060\u3001non_upper_case_globals\u3001non_camel_case_types\u3001non_snake_case \u3092 allow \u3057\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u8b58\u5225\u5b50\u304c\u751f\u6210\u3055\u308c\u308b\u306e\u3067\u3001\u3061\u3087\u3063\u3068\u300c\u3046\u30fc\u3093\u300d\u3068\u3044\u3046\u611f\u3058\u3067\u3059\u3002\u3042\u304f\u307e\u3067\u3082\u500b\u4eba\u306e\u611f\u60f3\u3067\u3059\u3002<\/p>\n<h1>\u304a\u308f\u308a\u306b<\/h1>\n<p>bindgen \u3092\u8272\u3005\u306a C\/C++ \u306e\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb\u3067\u8a66\u3057\u3066\u307f\u307e\u3057\u305f\u304c\u3001\/usr\/include \u3084 \/Library\/Developer\/CommandLineTools\/SDKs\/MacOSX.sdk \u306e\u4e0b\u306b\u3042\u308b\u3088\u3046\u306a\u8907\u96d1\u306a\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb\u3067\u306f Rust \u30b3\u30fc\u30c9\u751f\u6210\u306b\u5931\u6557\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u5fc5\u8981\u306a\u5b9a\u7fa9\u3060\u3051\u3092\u629c\u304d\u51fa\u3057\u305f\u3082\u306e\u3092 bindgen \u306b\u98df\u308f\u305b\u308b\u306a\u3069\u3001\u3061\u3087\u3063\u3068\u5de5\u592b\u3059\u308c\u3070\u3001\u304a\u304a\u3044\u306b\u5f79\u7acb\u3064\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u3001\u500b\u4eba\u7684\u306b\u306f\u3001C++ \u3067\u30e9\u30c3\u30d7\u3057\u3061\u3083\u3063\u305f\u65b9\u304c\u3044\u3044\u304b\u306a\u3001\u305b\u3063\u304b\u304f\u672c\u3082\u8cb7\u3063\u305f\u3057\u3001\u3068\u601d\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u307e\u305f\u3001\u65b9\u6cd5\uff11\u3068\uff12\u306e\u4e2d\u9593\u7684\u306a\u3084\u308a\u65b9\u3082\u3042\u308a\u307e\u3059\u306d\u3002<\/p>\n<p>\u3068\u3044\u3046\u8a33\u3067\u3001\u4eca\u56de\u306f\u4ee5\u4e0a\u3067\u3059\u3002<\/p>\n<p>\u6700\u5f8c\u307e\u3067\u304a\u8aad\u307f\u3044\u305f\u3060\u304d\u3001\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305f\u3002<\/p>\n<div>\n<p>\u79cb\u6d25\u65e9\u82d7\u3055\u3093: C++\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092C\u8a00\u8a9e\u3067\u304f\u308b\u3093\u3067Rust\u304b\u3089\u4f7f\u3046\u307e\u3067. https:\/\/akitsu-sanae.hatenablog.com\/entry\/2016\/12\/21\/010321\u00a0\u21a9<\/p>\n<p>Bjarne Stroustrup: The C++ Programming Language, 4th ed., 2013.\u00a0\u21a9<\/p>\n<p>@mod_poppo\u3055\u3093: Rust\u304b\u3089\u76f4\u63a5C++\u3092\u53e9\u3044\u3066\u307f\u308b. https:\/\/blog.miz-ar.info\/2015\/01\/rust-cxx\u00a0\u21a9<\/p>\n<p>The &#8220;bindgen&#8221; User Guide. https:\/\/rust-lang.github.io\/rust-bindgen\u00a0\u21a9<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u306e\u8a18\u4e8b\u306f Rust\u305d\u306e3 Advent Calendar\u306e20\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 Rust \u3092\u5c11\u3057\u305a\u3064\u89e6\u308a\u59cb\u3081 [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45606","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>- Blog - Silicon 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